My first semester courses for economics are Australia and the Global Economy and Microeconomics. I've found that those who did economics reasonably well in the HSC will find it fairly easy, those who didn't at times were a bit lost.
AGE is all essay writing, with one presentation. Workload is not that intense, presentation is pretty easy, essay is medicore. In the mid term exam, they gave out 3 possible questions so you can prepare, on the day, they randomly picked the questions. The final test will probably be a killer, 4 questions based on the last 7 weeks of work.
Microeconomics basically goes into greater depth of economic theory. Extends on what you've learnt in the HSC. 3x quizes, which can be very tricky, 1 presentation and a final exam which is mostly multiple choice and short answers. Due to the lack of funding, there is only one tutorial per fortnight, but you can usually get help from weekly workshops as well.
2nd semster contains one elective and macroeconomics. I have no clue.
You could also do applied finance/economics if your into banking/accounting.